William tarrant



(No Model.)

W. TARRANT. GONGENTRATOR.

No. 537,945. Patented Apr. 23, 189 5.

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NVILLIAM TARRANT, OF PETERSHAM, NElV SOUTH WALES.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 537,945, dated April23, 1895.

Application filed October 6, 1894:.

To all whom it may concern.-

Be it known that I, WILLIAM TARRANT, mining engineer, a subject of theQueen of Great Britain, residing at Weston Street, Petersham, nearSydney, in the British Colony of New South Wales, have invented a newand useful Concentrator, of which the following is a specification.

This invention relates to an improved shaking-table machine forconcentrating finely divided or discrete metalliferous material causedto flow through such machine with water and (when the shaking table isformed of amalgamating plates) for amalgamating gold and silvercontained in such material.

This invention has been devised in order to produce a cheaplyconstructed and easily operated machine for such purposes.

This improved shakingtable concentrating machine usable also as anamalgamator is constructed with a circular shelving plane or table orinverted conical dish to which a shaking and percussive motion isimparted to which the material to be treated is continuously fed andfrom which there is a continuous discharge of the gangue and preferablyfrom which there is a regularly intermittent discharge of concentrates;but in order that this invention may be clearly understood referencewill now be made to the drawings herewith, in which Figure 1 is acentral sectional elevation of a concentrating machine constructedaccording to this said invention, and Fig. 2 is a plan partly in sectionof the same.

The circular table or conical dishA is sup ported on ring or hoop Ahaving cross stays A and which ring is suspended by hooks A to bars orbracket pieces A from the main framing and is pivoted by eye piece A onpivot bracket A also on the main framing. Diametrically opposite to thepivot is a pin piece A on which takes the end of connecting rod B to acrank pin B in disk B on main shaft or spindle B in bearings B on themain framing. Brackets or L-pieces A from the framing hold on bolts Aindia rubber blocks A forming bulfers to impart the percussive motion tothe table or dish when it is reciprocated by the revolution of mainshaft B. A conical distributing surface or spreader O is supported by asubsidiary upper framing $erial No. 525,124. (No model.)

contents level of the table or dish A and hango5 ing below that level isa ring]? of blariketing or other woolen or fibrous material which issewed on to ring or hoop F through holes therein said ring or hoop beingsoldered or otherwise fixed on the under side of distribu- 7o ter orspreader O.

A machine constructed as described and explained would work effectuallythough the concentrates gathered on the table or dish A around pipe Dwould have to be withdrawn by an attendant at intervals as requiredthrough a door or closing piece to passage E; but it is preferable thatthe discharge of concentrates should be automatic and this is broughtabout by the mechanism now to be described.

The passage E terminates in a valve seating E against which takes valvepiece E fixed on pipe D. This pipeD carries a basin or director E abovethe receiver or receptacle E having inclined bottom E valve E areintermittently raised and lowered by lever E on fulcrum pin E on bracketE which lever has back spring E under compression so that the tendencyis for said lever to keep valve E to its seat E and passage E on closed.The back end of lever E is connected by link E having ball and socketjoint E thereto to bell crank E by other ball and socket joint E andthis bell crank has U- connection E to rod E from crank pin in 5 disk Eon secondary shaft or spindle E on bearings E and driven through pulleysE and B so that it will revolve considerably slower than main shaft B.The rod E may be lifted from its U-connection E with bell I00 crank E byhand lever E on spindle E actuating lever E so that the motion of leverE will cease and the intermittent opening of passage E be prevented. Theshaft B may be Through the center of 55 This pipe D passes through an 60The pipe D and driven by any suitable means although as preferable conepulleys B are shown to be driven from a counter shaft. The main framin gconsists of sole longitudinal beams G, sole cross beams G uprights G,top longitudinals G top cross beams G and subsidiary piece G and theupper framing consists of uprights G cross pieces G and bearers G Inoperation the material to be treated is fed with water into hopper O andfalling through grating or sieve C is distributed or spread by passingdown the cone surface 0 dropping upon the outer part of the-table ordish A. This table or dish fills with the water and material to the topof pipe D when the discharge .of the gangue or waste commences and thenany floating gold or surface mineral has to pass the trailing edge ofthe blanket ring F -before discharge is reached and by the nature of theblanketing or woolen or fibrous material such valuable particles aredetained and caused to settle upon the table or dish A whence they willpass to the concentrates dis- 5 charge. The heavier particles orconcentrates pass down the inclined plane of the table or dish A andwould gather around pipe D but for the automatic discharge which ashereinbefore explained is the regular but intermittent opening of thevalve E on seating E at bottom of discharge passage E. The gangue orwaste passing down pipe D flows through the launder D to where requiredwhile the concentrates falling through passage E are directed by basin Einto receptacle E up the inclined bottom E of which they may be raked orscraped when desired or necessary.

In use as an amalgamator and concentrator the distributor or spreader Ois made of amalgamating or copper plates and in use as an amalgamatoralone the table or dish A would likewise be made of amalgamating orcopper plates.

Having now particularly described and explained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. In combination with the inverted conical table A, aconical feed plate 0 covering the table A except at the edge and a ringof fibrous material projecting from the under surface of the feed plate0, substantially as described.

2. In a concentrating machine of the class set forth the combination andarrangement with a table or dish A having a peripheral feed a dischargepipe D and a discharge opening E of a valve seating E and a valve pieceE on said discharge pipe D and devices by which such valve piece E isregularly intermittently lifted off and on its seat such as Esubstantially as herein described and explained and as illustrated inthe drawings.

, 3. In combination with the table A, the discharge D, the discharge E,the valve closing the latter discharge, means for controlling saiddischarge, the receptacle E and the deflector or basin E", substantiallyas described.

WILLIAM TARRANT. Witnesses:

FRED WALSH, THOMAS J AMES WARD.

